It looks like the biggest takeover in years is in trouble

The maker of Budweiser is in a deal to buy the maker of Miller for $125 billion — but now that deal might be in trouble.YouTube/Scott Taipale
The beer giant SABMiller has told its employees to stop working on the company's combination with Anheuser-Busch InBev, Bloomberg reported on Wednesday.

Numerous activist investors in SABMiller, including Elliott Management, had raised concerns about the deal following a 12% drop in the pound versus the dollar since the UK voted in June to leave the European Union.

AB InBev also tweaked the terms of an alternative share-and-cash structure designed for SABMiller's two largest shareholders, raising the cash element by £0.88 ($1.15) a share, according to Reuters.